The analog port works, but the sound quality is not great. Flat so to say. This is a hardware problem (to get the Pi as cheap as it is, they had to use cheap hardware to produce sound). An external USB soundcard is recommended for better sound quality.

Wifi support (WPA, if the Pi-kernel supports your wifi-adapter)

This image is also a great way to get started with tinkering for other ways of using the Pi as a Music playing device, because it solves a lot of problems. (Mopidy can e.g. be modified to play local music-files, but it’s not enabled at the moment.)

Requirements

Working Raspberry Pi

Speakers/amplifier (analog or USB)

SD Card, 2GB minimum (tested on a 4GB model. It can probably run on a 1GB, but then you need to resize the partitions)

Computer with a modern browser; tablet or phone. The webinterface is tested with recent versions of Firefox, Chrome and iOS (iPad/iPhone), modern versions of Android (Chrome Mobile, Firefox Mobile). Internet Explorer version 10 works with the webinterface, earlier versions don’t. You can also use an MPD client to connect.